United States Department of Transportation
i
Development of a MASH TL-3 median barrier gate.
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2011-06-01
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[PDF-24.09 MB]
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Alternative Title:Project title: Roadside safety device crash testing program
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Edition:Technical/test report; Sept. 2008-Aug. 2010.
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Abstract:Median barriers are commonly used to separate opposing lanes of traffic on divided highways and to
separate managed lanes from general purpose lanes. Concrete median barriers (CMBs) are often preferred
on urban freeways with narrow medians due to their minimal deflection and low maintenance. However,
long, continuous runs of CMBs limit access of emergency and maintenance vehicles to the other side of a
roadway or a managed lane. Implementation of crashworthy median barrier gates at these locations can
maintain the desired level of median protection for motorists while offering improved cross-median access
for emergency and/or maintenance vehicles.
A new median barrier gate was developed and crash tested under this project. The gate spans a 30-ft
opening in a concrete median barrier and consists of two vertically stacked 12-inch × 12-inch × ¼-inch steel
tubes connected to steel end brackets with 2¼-inch diameter steel pins.
The gate is economical to fabricate and install. It can be manually operated by a single person and is
designed to accommodate reversible traffic flow on both sides of the median and be operable in both
directions on each end. The median barrier gate satisfies MASH Test Level 3 (TL-3) impact performance
criteria and is considered suitable for implementation on Texas highways where cross-median access is
desired.
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